The theme of Dr. Horrible’s Sing-Along Blog is the power of friendship. The film follows the story of Dr. Horrible (Neil Patrick Harris), a mad scientist who creates a web series called “Dr. Horrible’s Sing-Along Blog” with the help of his friend, Penny (Felicia Day) in order to get his name out there and make some money.
However, things quickly go awry and Dr. Horrible finds himself fighting against the evil Captain Hammer (Nick Offerman) and his team of super villains in order to save Penny and their world from destruction. The film is filled with comedy and heart, as it shows the power of friendship and the importance of standing up for one another even when things seem impossible. Ultimately, the film teaches us that no matter what comes our way, we can always find hope and strength within ourselves to fight on behalf of those we love.